IIT FOUNDATION
Test – 5 (IX Std)
Name-___________________________________________________
I. Answer the following : 5 x 3 = 15 M
1) Arrange the following is order of increasing radie
i) I, I+, I- ii) N,O,P iii) F, Cl, Br
2) For each of the following pairs, start which one is large in size.
i) Li, F ii) O, Se iii) Fe2+, Fe3+
iv) Br, Br- v) Na+, F- vi) K, K+
3) From each set, choose the atom which has the largest ionization eathalply
i) F, O, N ii) Mg, P, Ar iii) B, Al, Ga
4) For each of the following pairs, predict which one has lowery first ionization energy.
i) N (or) O ii) Cl (or) F iii) Na (or) Na+
iv) K (or) Ar v) Kr (or) Xe vi) H or) He
5) Which of the following pairs has higher electronegativity
i) O, S ii) F, Cl iii) O, O-
iv) O, F v) Li, A1
II. Answer the following : 5 x 2 = 10M
1) The first ionization energy of Carbon atom is greater than that of boron
whereas the reverse is true for the second ionization energy. Explain.
2) Differentiate between Oxidizing reagent and reducing reagent.
3) A student reported the raelic of Al3+, Mg2+ and F- as 136 pm, 65 pm and 50 pm respectively. Is the order correct ? Comment.
4) Define mendeleef periodic law and modern periodic law.
5) Write short notes on (i) Dobereinutroid (ii) Newlands detare concept.

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